由于最近的項(xiàng)目中多處需要用到多行多列的RadioButton船逮，而google原生的RadioGroup又不能實(shí)現(xiàn)畴嘶！因此就要自己動(dòng)手實(shí)現(xiàn)了~

本文首發(fā): MyBlog

注意:這里所說(shuō)的RadioButton都是在代碼中動(dòng)態(tài)添加的!

看下效果圖:

實(shí)現(xiàn)多行多列的RadioButton

行列對(duì)齊RadioButton

1、開(kāi)始造輪子: 分為四步

• 重寫RadioGroup-->目的是使 RadioButton可以自動(dòng)換行

• 布局中引用MyRadioGroupAuto

• 代碼中根據(jù)數(shù)據(jù)動(dòng)態(tài)添加RadioButton,然后MyRadioGroup通過(guò)addView把RadioButton加進(jìn)去

• 這里需要講下RadioButton的幾個(gè)屬性

• radioButton.setPadding(20, 0, screenWidth / 6, 0);// 設(shè)置文字距離按鈕圖片四周的距離

• radioButton.setButtonDrawable(R.drawable.transfer_radiobutton_drawable); //點(diǎn)擊效果

• radioButton.setTag(loanAndFeeList.get(i)); // 設(shè)置tag,可以存一些數(shù)據(jù)

• radioButton.setTextSize(13); //默認(rèn)單位是 sp

• radioButton.setHeight(50); //默認(rèn)單位是px

• RadioButton clickRadioButton = (RadioButton) radioGroup.findViewById(checkedId); //通過(guò)RadioGroup對(duì)象獲取點(diǎn)擊的RadioButton組件

• 設(shè)置RadioGroup點(diǎn)擊事件

2饭入、下面直接上代碼: 三步

• 自定義MyRadioGroupAuto

/**
 * Author: 0027008122 [yang.jianan@zte.com.cn]
 * Time: 2016-08-02 11:33
 * Version: 1.0
 * TaskId:
 * Description:
 */
 public class MyRadioGroupAuto extends RadioGroup {
    public MyRadioGroupAuto(Context context) {
        super(context);
    }

    public MyRadioGroupAuto(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        //獲取最大寬度
        int maxWidth = MeasureSpec.getSize(widthMeasureSpec);
        //獲取Group中的Child數(shù)量
        int childCount = getChildCount();
        //設(shè)置Group的左邊距耗式，下面也會(huì)使用x計(jì)算每行所占的寬度
        int x = 0;
        //設(shè)置Group的上邊距，下面也會(huì)使用y計(jì)算Group所占的高度
        int y = 30;
        //設(shè)置Group的行數(shù)
        int row = 0;
        for (int index = 0; index < childCount; index++) {
            final View child = getChildAt(index);
            if (child.getVisibility() != View.GONE) {
                child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);
                //重新計(jì)算child的寬高
                int width = child.getMeasuredWidth();
                int height = child.getMeasuredHeight();
                //添加到X中筹吐，(width+10) 設(shè)置child左邊距
                x += (width + 10);
                //行數(shù)*child高度+這次child高度=現(xiàn)在Group的高度,(height + 10)設(shè)置child上邊距
                y = row * (height + 10) + (height + 10);
                //當(dāng)前行寬X大于Group的最大寬度時(shí)，進(jìn)行換行
                if (x > maxWidth) {
                    //當(dāng)index不為0時(shí)秘遏，進(jìn)行row++丘薛，防止FirstChild出現(xiàn)大于maxWidth時(shí),提前進(jìn)行row++
                    if (index != 0)
                        row++;
                    //child的width大于maxWidth時(shí)，重新設(shè)置child的width為最大寬度
                    if (width >= maxWidth) {
                        width = maxWidth - 30;
                    }
                    //重新設(shè)置當(dāng)前X
                    x = (width + 20);
                    //重新設(shè)置現(xiàn)在Group的高度
                    y = row * (height + 10) + (height + 10);
                }
            }
        }
        // 設(shè)置容器所需的寬度和高度
        setMeasuredDimension(maxWidth, y);
    }


    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        final int childCount = getChildCount();
        int maxWidth = r - l;
        int x = 10;
        int y = 0;
        int row = 0;
        for (int i = 0; i < childCount; i++) {
            final View child = this.getChildAt(i);
            if (child.getVisibility() != View.GONE) {
                int width = child.getMeasuredWidth();
                int height = child.getMeasuredHeight();
                x += (width + 10);
                y = row * (height + 10) + (height + 10);
                if (x > maxWidth) {
                    if (i != 0)
                        row++;
                    if (width >= maxWidth) {
                        width = maxWidth - 30;
                    }
                    x = (width + 20);
                    y = row * (height + 10) + (height + 10);
                }
                child.layout(x - width, y - height, x, y);
            }
        }
    }
}

• 布局中引用MyRadioGroupAuto

<com.ztesoft.zsmart.datamall.app.widget.MyRadioGroupAuto
        android:id="@+id/my_radio_group_auto"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="33dp"
        android:layout_marginLeft="22dp"
        android:layout_marginRight="22dp"
        android:layout_marginTop="16dp">
</com.ztesoft.zsmart.datamall.app.widget.MyRadioGroupAuto>

• 代碼中動(dòng)態(tài)添加RadioButton

public class CheckboxRadiobuttonDemo extends Activity {
    /**
     * Called when the activity is first created.
     */
    private RadioGroupAuto rgp;
    private RadioGroup yuansheng;

    private String[] loanList;
    private String[] loanFeeList;
    private List<String> loanAndFeeList;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        //獲取屏幕信息
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        int screenWidth = dm.widthPixels;

        loanAndFeeList = new ArrayList<>();
        loanList = "800,1000,1600,200,300,500,700".split(",");
        loanFeeList = "50,80,100,20,30,50,70".split(",");
        
        //求最大最小值 (為了保持RadioButton文字長(zhǎng)度一致,跟最長(zhǎng)的保持一致!)
        int max = Integer.parseInt(loanList[0]);
        int min = Integer.parseInt(loanList[0]);
        for (String i : loanList) {
            int j = Integer.parseInt(i);
            max = max > j ? max : j;
            min = min < j ? min : j;
        }
        
        String maxS = String.valueOf(max);
        int maxLen = maxS.length();

        for (int i = 0; i < loanList.length; i++) {
            loanAndFeeList.add( loanList[i] + "," + loanFeeList[i]);
        }


        rgp = (RadioGroupAuto) findViewById(R.id.RadioGroup01);

        int len = loanAndFeeList.size();

        for (int j = 0; j < len; j++) {

            RadioButton radioButton = new RadioButton(this);
            radioButton.setPadding(20, 0, screenWidth / 6, 0);  // 設(shè)置文字距離按鈕四周的距離
            radioButton.setButtonDrawable(R.drawable.transfer_radiobutton_drawable);

            String newLoanList = loanList[j];
            if (loanList[j].length() < maxLen) {
                newLoanList = newLoanList + appendLength(maxLen - loanList[j].length());

                // 實(shí)現(xiàn) TextView同時(shí)顯示兩種風(fēng)格文字 http://txlong-onz.iteye.com/blog/1142781
                SpannableStringBuilder sb = new SpannableStringBuilder(newLoanList);
                final ForegroundColorSpan fcs = new ForegroundColorSpan(Color.WHITE);
                sb.setSpan(fcs, loanList[j].length(), maxLen, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
                radioButton.setText(sb);
            } else {
                newLoanList = loanList[j];
                radioButton.setText(newLoanList);
            }
            
            radioButton.setId(j); //設(shè)置RadioButton的id
            radioButton.setTag(loanAndFeeList.get(j)); //tag用于存儲(chǔ)RadioButton的一些數(shù)據(jù)
            radioButton.setTextSize(13); //默認(rèn)單位是 sp
            radioButton.setHeight(50); //默認(rèn)單位是px
            rgp.addView(radioButton); //添加到RadioGroup中

        }

        rgp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                RadioButton clickRadioButton = (RadioButton) group.findViewById(checkedId);

                String tipInfo = "id: " + clickRadioButton.getId() + " text: " + clickRadioButton.getText() +
                        /*"hint: " + clickRadioButton.getHint() +*/ " tag:" + clickRadioButton.getTag();
                System.out.println(tipInfo);

                Toast.makeText(CheckboxRadiobuttonDemo.this, tipInfo,
                        Toast.LENGTH_SHORT).show();
            }
        });

        //根據(jù)這個(gè)來(lái)設(shè)置默認(rèn)選中的項(xiàng), 注意,這個(gè)要設(shè)置在監(jiān)聽(tīng)之后!,否則默認(rèn)點(diǎn)擊監(jiān)聽(tīng)不到!雖然有選中效果
        //參考 http://blog.csdn.net/lzqjfly/article/details/16963645
        //以及http://stackoverflow.com/questions/9175635/how-to-set-radio-button-checked-as-default-in-radiogroup-with-android
        rgp.check(0);
    }

    /**
     * 補(bǔ)全長(zhǎng)度,保持最長(zhǎng)的長(zhǎng)度
     *
     * @param count 字符串長(zhǎng)度
     * @return 補(bǔ)全后的長(zhǎng)度
     * 這里長(zhǎng)度不夠的就用 "s" 占位, 賦值的時(shí)候?qū)⒆煮w設(shè)置白色!
     */
    public String appendLength(int count) {
        String st = "";
        if (count < 0) {
            count = 0;
        }
        for (int i = 0; i < count; i++) {
            st = st + "s";
        }
        return st;
    }
}